Stapler



FIG. 1 is a perspective view of a stapler;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line portions of the figures are included to show an unclaimed feature which forms no part of the claimed design. 

CLAIM The ornamental design for a stapler, as shown and described. 